Cream-separator.



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No.r 850,954.

Specification of Letters Patent.

Patented April 23, 1907.

Application filed December 5, 1905. Serial No. 290,459.

To rl/ZZ whom t muy conce/rit.'

Beit known that l, ,IJAITCHLAN ALLAN Me- LEAN, of the city of 'l'oronto, county of York, Province of Ontario, in the llominion of Canada, have invented certain new and useful improvements in Cream-Separators; and l do hereby declare that the following is a full,

clear, and exact description of the same.

lhis invention relates toimprovements in crcain-scparators as described in thc present spmsiflcation and set forth in the accompanying drawings, thatV form part of the same.

'f'he invention consists, essentially, of adrag or step-box having av vertical orifice therethrough and holes in the wall thereof, a selfadjusting bearing member supported in said stepboX, a tube having a beveled lower end extendingl into said bearing member and supporting a bowl, and a casing secured to the lower portion of said step-box.

The objects of the invention are to devise a drag on the separator which shall be free vfrom lateral motion and whereby any wear in the bearing parts will be taken up auton'n'itically and the friction on the bowl minimixed, and to provide a separator in which. the parts may be readil removed and cleansed and at the same time durable.

In the drawings, Figure l is a pm'spective view of a cream-separator, partially broken away, showing the inventipn applied thereto. Fig. 2 is an enlarged sectional detail through the drag portion, showing a portion of the bowl-casing.

Like letters of reference indicate correspending parts in each fleure.

Referring to the drawings, a is the bowlcasing of the separator, which converges toward, its lowcr end and has a threaded opening?) at its lower extremity. The casingl e forgns part of or is attached to the main frame' c of the machine and has located in its interior a vertical tubular bowl d. The bowl (l is journznled at its upper -end in suitable bearings and is rotated by the spindle e,

lwhich receives its motion from a suitable gearfnginclosed1n the caslngef the maclnne.I

g and i are the milk and cream covers, provided with dischargwspout's, and are located on the machine at the upper portion of the casing e.

t is a feed-tank situated to the side of the casing c and above the same and is connected by a feed-tube j, which carries the milk to the lowei; end of the casing d.

c is the drag or step-box, which is threaded lower extremity of the casing ct.

and screws into the threaded orifice b in the 'lhe drag fc has a tapered central orifice/L, forming a noz zle, into which the end of the feedetube extends. i

lm is a cylindrical hollowed upper-portion of the drag, having vent-holes n 1n the walls thereof.

o is a central cylindrical oriiice leading vertically ul'nvard from the tapered orificel or nozzle portion of the drag and reduced at p to form a small opening through which the milk is forced 'upwardly in a small jet.

y a spiral spring which rests upon the bottom of the hollowed portion m of the drag /f.

1 is a cup forming a bearing member and having a central hole therethrough vertically in line with the reduced orifice p to allow the jet of milk to pass freely in an upward direction. 'l`hc cup r is supported 1n the cylindrical hollowed portion mof the step-box upon the spiral springq and has a vertical movement therein controlled by said spring.

s are balls traveling in the ball-race formed. by the cup fr and are retained in their relative positions b the retainer t.

u is the of the bowl dl having a suitable orifice leading therethrough. c is a tube registeringr with said central orifice and secured to the base of the bowl and having a beveled lower edge w j ournaled on the balls s,

lt will be seen that as the tube c is cen.- trally located on the bowl and the ballerace 1' is in central alineinent with the said bowl the lower end of' the bowl will be held by the balls in perfect central alinement and will efn fectually prevent any lateral motion while it is rotating.

The tube c has a central vertical orifice which is flared outwardly at the lower end, so that the jet of milk passing upward from the orifice 0 will pass freely through the 'orifico a: into the bowl. I

The vertical tubular bowl d is provided with the usual means for causing the separation of the milk and cream by the centrifugal action and is suitably connected at the upper portion to the covers f and g, whichearry the milk and cream from the machine.

As the appliances in the bowl and covers do notform a part of this invention, further description of these parts is eliminated.

In the operation of this machine the milk i is vplaced in the feed-tank 'i and passes from the said feed-tank through ,the feed-tube 7 te lthe tapered orliice or nozzle Z. The bodyof milk 1n the feed-tank and tube forces the milk upwardly through the reduced orificev in the step-box and the orifice :n in the spindle of the bowl. The force of the jet of lmilk passing upwardly into the bowl and the cen'- trifr'ugal action of the rotating bowl, aided by cream froml the milk, the two portions pass' the apparatus contained therein, carries the milk to vthe upper-portion of the said'tubular bowl and during the passage separates vthe ing4 outwardly through the spouts in the covers g and h.

With a drag or step-box'such as described it will be readily seen that should there be any wear upon the upper bearings the spring g, pushing upwardly upon the ball-cup 1*, and

consequently upon the bowl, through the ballbearings, :will automatically take up such wear or looseness, and as there is practically y*no wear in a ball-bearing all tendency to lateralmotionof the bowl will be eliminated.

When it is desired to remove the parts of the machine for cleansing purposes, the cov- -ers g and h are removed and the bowl d lifted I rrom the casing. The milk remaining in the bowl will drain through 'the holes n inthe casin of the step-box.- The ball-cup q, balls r, an spring p may then be lifted out of the hollow cylindrical portion'm and properly cleansed. These parts are readily removed without having to unscrew any portion of the drag or step-box, and as they are all formed of metal' there are no`parts to retain any of the milk or cream which may havegot into them.

What I claim as my invention is- 1. In a cream-separator, the combination'k with the bowl and feed-tank, of a step-box having a central vertical orifice therethrough and a cup-shaped recess extending downwardly from its u per end, 'said step-box being connected wit said feed-tank and forming the passage for the liuid into said machine, a cushion-springin said cup-shaped recess, a ringforming a ball-race supported o'n said spring, balls in saidv race, and a tube having its lower edge beveled and journaled'on said balls and supporting said bowl, as and for the purpose specilied.

for the iiuid into said machine, a cushionf sprin in said cup-shaped recess, a ring formbeveled and journaled on said balls and supporting said bowl, as and for the purpose specified.

Signed at Toronto this 22d ber, 1905.

LAUCHLAN ALLAN MOLEAN.

Witnesses z,

H. DENNIsoN, E. WILKIN.

day of iNovem- In a cream-separator, the combination with the bowl. and feed-tank, of a step-box ing a all-race supported on said spring, balls in said race, and a tube having its lower edge 

